726. In the case of a customer traveling to or from Cuba under a specific license, may providers of carrier and travel services collect and retain on file the specific license number in lieu of a physical or electronic copy of the license?

Yes. OFAC allows persons subject to U.S. jurisdiction providing authorized carrier or travel services to a customer traveling under a specific license to maintain either the specific license number or a copy of the license on file. See 31 CFR § 515.572(b)(1) Persons subject to U.S. jurisdiction providing authorized carrier or travel services that choose to collect the specific license number in lieu of the license must maintain a record of that number, as well as the other required information set forth in § 515.572(b), for at least five years.